Blowpipe



G. H. ZOUCK.

BLOWPIPE.

APPLICATION FIILED APR. 18. 1919.

1 8?% 735o W Mm 29 11921.,

INVENTOR Gfiaw-o Zorue/' I BY 4 ATTORN 'UNHTJED STATES PATENT CJDFFHCEOGEORGE E. ZUUCK, 0F ORANGE, NEW JERSEY, ASSIGNOR TO AIR REDUCTION COM-PANY, INCORPORATED, A CORPORATION'OF NEW YORK.

BLOWIPIPE.

Application filed April 18, 1919.

T 0 all whom it may concern:

Be it known that I, GEORGE H. Zopcx, a citizen of the United States,residing at Orange, in the countyof Essex, State of art to which itappertains to make and use the same.

This invention relates to blowpipes burning mixtures of combustible andoxidizing gases to produce high temperature flames for heating, weldingand cutting operations, and more particularly to the type of blowpipesillustrated and described in my copending applications Serial No.259,892-and Serial No. 259,893. p

The object of my invention is the preservation of the structure and themaintenance of the proper proportioning of the gases.

Further objects and advantages of the invention will be, apparent as itis better understood by reference to the following specification whenread in connection with the accompanying drawing in which;

Figure 1 is a longitudinal section through a blowpipe head and tipembodying my invention;

Fig. 2 is a section on the line 2 2 of Fig. 1; and

Fig. 3 is a rear end elevation of the tip.

In blowpipes of the character referred to, the tips, are constructed ofcopper or of alloys in which copper predominates, such as bronze. Thecombustible gas is delivered to the discharge passage of the tip throughgrooves or depressions in the surface at the rear of the tip. The tip isheld in assembled relation with the blowpipe head by a nut. When the tipis constructed of relatively soft metal such as copper, the grooves may,

if pressure is carelessly applied to the nut while the tip is heated. bedeformed and reduced in cross sectional area. This may result in avariation of the capacity of thegrooves or depressions, which arecarefully formed in the-blowpipe to convey a predetermined amount of gasto the discharge passage of the tip.

I have discovered that deformation of the grooves or depressions may beeasily prevented by surrounding that portion of the Specification ofLetters Patent.

Patented Ma. 2e, rear.

Serial No. 291,104.

tip, in which such grooves or depressions are formed, by a collar of ametal which is more resistant to deformation than the body of the tip.Such a collar may be shrunk onto the tip or it may be threadedly orotherwise secured thereto.-

When the tip is thus protected the metal, of which it is constructed, isprevented from flowlng under the influence of heat and pressure and thegrooves or depressions are maintained in their original form anddimenslons. Thus the structure is preserved, the proper functioningthereof is insured and the intended proportion of gases in the .mixtureis maintained, regardless of the:

Referring to the drawing, in which I have illustrated a preferred modeof applying my invention, 5 indicates a blowpipe head havmg passages 6and 7" to which oxidizing and combustible gas are delivered throughpipes 8 and 9. The passage 6 terminates at the apex of a conical seat10, in which an annular channel 11 is formed, surrounding the end of thepassage 6. The passage 7 terminates in the channel 11.

A tip 12 having a discharge passage 13 is held in assembled relationwith the head by a nut 14:. The tip is provided at its inner end with aconical surface cooperating with the seat 10 to form a gas-tight jointsurrounding the channel 11. Grooves or depressions 15 are milled,pressed or otherwise formed in the conical surface to convey combustiblegas from the channel 11 to the d1scharge passage 13 where it mixes atthe inlet to the discharge passage, with oxidizing gas from the passage6. The grooves or depressions 15 are carefully proportioned to deliver,at a given pressure, a predetermined volume of combustible gas to thedischarge passage 13.

Surrounding the enlarged end of the tip 12 is a collar 16 which ispreferably flanged at 17 toengage a shoulder on the tip against whichthe nut 14 bears. Preferably the collar 16 is spun over the edge of thetip as indicated at 18. The collar is formed of a metal, having a higherresistance to deformation than the metal of the tip. The tendency ofpressure applied by the nut 14 is to cause the end of the tip to bulgeand flatten with accompanying distortion of the grooves or depressions15. The collar 16 maintains the end of the tip in its original shape.Thus preservation of the grooves or depressions 15 is accomplished.

Various changes may be made in the form, arrangement and construction ofthe parts, Without departing from the invention or sacrificing any ofits advantages.

I claim:

-1. In a blowpipe, the combination with a head, having passages foroxidizing and combustible gas and a seat, of a removable tip having adischarge passage, a surface cooperating with said seat, and grooves ordepressions in said surface whereby gas from one of the passages in saidhead is conveyed to and mixed with gas from the other passages in saidhead at the mouth of said discharge passage, means for holding said headand tip in assembled relation and a. collar mounted on and surrounding"the inner end of the removable tip to prevent deformation thereof whenpressure is applied thereto by said holding means.

2. In a blowpipe, the combination with a head, having passages foroxidizing and combustible gas and a projecting conical seat, of .aremovable tip having a discharge passage, a recessed surface cooperatingwith said seat, and radially disposed grooves or inner end of saidremovable tip to prevent deformation of said grooves when pressure isapplied to said tip by said holding means.

In testimony whereof I afliX my signature.

* GEORGE H. ZOUGK.

